Chives are native to Europe and are still grown there today. Methods of freeze-drying have been perfected in the commercial production arena. The resulting product is almost equal to fresh chives and they can be substituted in equal amounts when called for in a recipe.
Chives are the smallest member of the onion family and have a delicate flavor. They can be used as a substitute in any recipe that calls for chopped green onions and will produce a somewhat milder flavor. Try mixing them into soft cream cheese, sour cream, cottage cheese or butter to create a great bread spread. Of course they're always good on potatoes.